625222321 has 8 divisors (see below), whose sum is σ = 627522120. Its totient is φ = 622927872.

The previous prime is 625222319. The next prime is 625222361. The reversal of 625222321 is 123222526.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 62583921 + 562638400 = 7911^2 + 23720^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625222321 - 2¹ = 625222319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625222361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541681 + ... + 542833.

It is an arithmetic number, because the mean of its divisors is an integer number (78440265).

Almost surely, 2^625222321 is an apocalyptic number.

It is an amenable number.

625222321 is a deficient number, since it is larger than the sum of its proper divisors (2299799).

625222321 is a wasteful number, since it uses less digits than its factorization.

625222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675.

The product of its digits is 2880, while the sum is 25.

The square root of 625222321 is about 25004.4460246573. The cubic root of 625222321 is about 855.0893382703.

Adding to 625222321 its reverse (123222526), we get a palindrome (748444847).

The spelling of 625222321 in words is "six hundred twenty-five million, two hundred twenty-two thousand, three hundred twenty-one".